Reference to entity ... for which no system identifier could be generated

Cause:

This is usually a cascading error caused by a an undefined entity reference or use of an unencoded ampersand (&) in an URL or body text. See the previous message for further details.

Example:

GoodWelcome to Dave & Patty's House of Wax
GoodWelcome to Dave & Patty's House of Wax

Solution:

Replace special characters with their respective HTML entities.

References: